From patchwork Thu Apr 2 10:03:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1265511 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=N3GSzdjG; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48tJb93546z9sR4 for ; Thu, 2 Apr 2020 21:05:09 +1100 (AEDT) Received: from localhost ([::1]:36360 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJwih-0003oi-Bk for incoming@patchwork.ozlabs.org; Thu, 02 Apr 2020 06:05:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33846) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJwh3-0001RC-OI for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jJwh2-0000Uf-CR for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:25 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:38912 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jJwh2-0000TO-8o for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585821803; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Kep3V9mG5AJTYZhlUeT2WOe008YTZEEiwjQV6Q9cMjM=; b=N3GSzdjGxmwQNtOMw63/E+cmJB8zYyTo5OltD+1NTwSMLf7QJyZlA0g6uH/9VycEWu/Qw4 f46qZNEcl9M8LacX66ZHG/Y+IYyuPP31KsXA/sIp7amU6PMIVimw+b04QSPP9wqyDuRsrs Q6sat3ugFBiSpoj3QclypAPhebHjDFM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-220-QymQzCAcOsuahTgZarNpnw-1; Thu, 02 Apr 2020 06:03:20 -0400 X-MC-Unique: QymQzCAcOsuahTgZarNpnw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8E27F8017F5; Thu, 2 Apr 2020 10:03:19 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-113-198.ams2.redhat.com [10.36.113.198]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4413B5DA2C; Thu, 2 Apr 2020 10:03:17 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [RFC 3/5] qmp: add QMP command virtio-queue-status Date: Thu, 2 Apr 2020 12:03:00 +0200 Message-Id: <20200402100302.833267-4-lvivier@redhat.com> In-Reply-To: <20200402100302.833267-1-lvivier@redhat.com> References: <20200402100302.833267-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Thomas Huth , "Michael S. Tsirkin" , Markus Armbruster , "Dr. David Alan Gilbert" , Michael Roth , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This new command shows internal status of a VirtQueue. (vrings and indexes). Signed-off-by: Laurent Vivier --- hw/virtio/virtio-stub.c | 6 +++ hw/virtio/virtio.c | 35 +++++++++++++++ qapi/virtio.json | 98 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 139 insertions(+) diff --git a/hw/virtio/virtio-stub.c b/hw/virtio/virtio-stub.c index 8fe2d6cd8892..5b4ed6fd531e 100644 --- a/hw/virtio/virtio-stub.c +++ b/hw/virtio/virtio-stub.c @@ -17,3 +17,9 @@ VirtioStatus *qmp_virtio_status(const char* path, Error **errp) { return qmp_virtio_unsupported(errp); } + +VirtQueueStatus *qmp_virtio_queue_status(const char *path, uint16_t queue, + Error **errp) +{ + return qmp_virtio_unsupported(errp); +} diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 7f6e21e4ab2c..271d4ca3417f 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3855,6 +3855,41 @@ static VirtIODevice *virtio_device_find(const char *path) return NULL; } +VirtQueueStatus *qmp_virtio_queue_status(const char *path, uint16_t queue, + Error **errp) +{ + VirtIODevice *vdev; + VirtQueueStatus *status; + + vdev = virtio_device_find(path); + if (vdev == NULL) { + error_setg(errp, "Path %s is not a VirtIO device", path); + return NULL; + } + + if (queue >= VIRTIO_QUEUE_MAX || !virtio_queue_get_num(vdev, queue)) { + error_setg(errp, "Invalid virtqueue number %d", queue); + return NULL; + } + + status = g_new0(VirtQueueStatus, 1); + status->queue_index = vdev->vq[queue].queue_index; + status->inuse = vdev->vq[queue].inuse; + status->vring_num = vdev->vq[queue].vring.num; + status->vring_num_default = vdev->vq[queue].vring.num_default; + status->vring_align = vdev->vq[queue].vring.align; + status->vring_desc = vdev->vq[queue].vring.desc; + status->vring_avail = vdev->vq[queue].vring.avail; + status->vring_used = vdev->vq[queue].vring.used; + status->last_avail_idx = vdev->vq[queue].last_avail_idx; + status->shadow_avail_idx = vdev->vq[queue].shadow_avail_idx; + status->used_idx = vdev->vq[queue].used_idx; + status->signalled_used = vdev->vq[queue].signalled_used; + status->signalled_used_valid = vdev->vq[queue].signalled_used_valid; + + return status; +} + VirtioStatus *qmp_virtio_status(const char* path, Error **errp) { VirtIODevice *vdev; diff --git a/qapi/virtio.json b/qapi/virtio.json index 2af4d95b9893..ab70500d919b 100644 --- a/qapi/virtio.json +++ b/qapi/virtio.json @@ -117,3 +117,101 @@ 'data': { 'path': 'str' }, 'returns': 'VirtioStatus' } + +## +# @VirtQueueStatus: +# +# Status of a VirtQueue +# +# @queue_index: VirtQueue queue_index +# +# @inuse: VirtQueue inuse +# +# @vring_num: VirtQueue vring.num +# +# @vring_num_default: VirtQueue vring.num_default +# +# @vring_align: VirtQueue vring.align +# +# @vring_desc: VirtQueue vring.desc +# +# @vring_avail: VirtQueue vring.avail +# +# @vring_used: VirtQueue vring.used +# +# @last_avail_idx: VirtQueue last_avail_idx +# +# @shadow_avail_idx: VirtQueue shadow_avail_idx +# +# @used_idx: VirtQueue used_idx +# +# @signalled_used: VirtQueue signalled_used +# +# @signalled_used_valid: VirtQueue signalled_used_valid +# +# Since: 5.1 +# +## + +{ 'struct': 'VirtQueueStatus', + 'data': { + 'queue_index': 'uint16', + 'inuse': 'uint32', + 'vring_num': 'int', + 'vring_num_default': 'int', + 'vring_align': 'int', + 'vring_desc': 'uint64', + 'vring_avail': 'uint64', + 'vring_used': 'uint64', + 'last_avail_idx': 'uint16', + 'shadow_avail_idx': 'uint16', + 'used_idx': 'uint16', + 'signalled_used': 'uint16', + 'signalled_used_valid': 'uint16' + } +} + +## +# @virtio-queue-status: +# +# Return the status of a given VirtQueue +# +# @path: QOBject path of the VirtIODevice +# +# @queue: queue number to examine +# +# Returns: Status of the VirtQueue +# +# Since: 5.1 +# +# Example: +# +# -> { "execute": "virtio-queue-status", +# "arguments": { +# "path": "/machine/peripheral-anon/device[3]/virtio-backend", +# "queue": 0 +# } +# } +# <- { "return": { +# "signalled_used": 373, +# "inuse": 0, +# "vring_desc": 864411648, +# "vring_num_default": 256, +# "signalled_used_valid": 1, +# "vring_avail": 864415744, +# "last_avail_idx": 373, +# "queue_index": 0, +# "vring_used": 864416320, +# "shadow_avail_idx": 619, +# "used_idx": 373, +# "vring_num": 256, +# "vring_align": 4096 +# } +# } +# +## + +{ 'command': 'virtio-queue-status', + 'data': { 'path': 'str', 'queue': 'uint16' }, + 'returns': 'VirtQueueStatus' +}